Congressional investigators have confirmed that a top FBI official met with Democratic Party lawyers to talk about allegations of Donald Trump-Russia collusion weeks before the 2016 election, and before the bureau secured a search warrant targeting Trump’s campaign.

Former FBI general counsel James Baker met during the 2016 season with at least one attorney from Perkins Coie, the Democratic National Committee’s private law firm.

That’s the firm used by the DNC and Hillary Clinton’s campaign to secretly pay research firmFusion GPS and Christopher Steele, a former British intelligence operative, to compile a dossier of uncorroborated raw intelligence alleging Trump and Moscow were colluding to hijack the presidential election.

The dossier, though mostly unverified, was then used by the FBI as the main evidence seeking a Foreign Intelligence Surveillance Act (FISA) warrant targeting the Trump campaign in the final days of the campaign.

The revelation was confirmed both in contemporaneous evidence and testimony secured by a joint investigation by Republicans on the House Judiciary and Government Oversight committees, my source tells me.

It means the FBI had good reason to suspect the dossier was connected to the DNC’s main law firm and was the product of a Democratic opposition-research effort to defeat Trump — yet failed to disclose that information to the FISA court in October 2016, when the bureau applied for a FISA warrant to surveil Trump campaign adviser Carter Page.

“This is a bombshell that unequivocally shows the real collusion was between the FBI and Donald Trump’s opposition — the DNC, Hillary and a Trump-hating British intel officer — to hijack the election, rather than some conspiracy between Putin and Trump,” a knowledgeable source told me.

Baker was interviewed by lawmakers behind closed doors on Wednesday. Sources declined to divulge much about his testimony, other than to say it confirmed other evidence about the contact between the Perkins Coie law firm and the FBI.

The sources said Baker identified lawyer Michael Sussman, a former DOJ lawyer, as the Perkins Coie attorney who reached out to him and said the firm gave him documents and a thumb drive related to Russian interference in the election, hacking and possible Trump connections.

Information gathered separately by another congressional committee indicate the contact occurred in September, the month before the FISA warrant was approved.

This is just the beginning of what is more evidence of corruption regarding the FBI and DNC.